Windows also includes the WSD Challenger, which is a module that enables web services clients to challenge disconnected devices to reestablish device communication when the device comes back online.

Important

WSD Challenger functionality has been deprecated and all WSD Challenger-related documentation will be removed in 2018.

The following sections describe how to use WSDScan.sys to install a WIA driver for a web services scanner, how to use function discovery to initialize SOAP communications with the scanner device from within the WIA driver, and how to challenge a disconnected device by using the WSD Challenger: